CN116156612A - Microwave power control method and system combining binary search and feedback regulation - Google Patents
Microwave power control method and system combining binary search and feedback regulation Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/22—TPC being performed according to specific parameters taking into account previous information or commands
- H04W52/226—TPC being performed according to specific parameters taking into account previous information or commands using past references to control power, e.g. look-up-table
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/20—TPC being performed according to specific parameters using error rate
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/52—TPC using AGC [Automatic Gain Control] circuits or amplifiers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention relates to a microwave power control method and a system combining binary search and feedback regulation, belongs to the technical field of output power regulation of a microwave system, and solves the problems of inaccurate power regulation and large power fluctuation after regulation in the prior art. Comprising the following steps: performing binary search of a power adjustment factor based on the target power value and the current power value reported by the power amplifier, generating a first power adjustment factor, and transmitting the first power adjustment factor to the baseband signal module until the difference value between the reported current power value and the target power value meets an error range; the power amplifier amplifies each first baseband signal and reports the current power value to the monitoring module, and when the difference value between the reported current power value and the target power value exceeds an error range, a second power adjustment factor is generated and sent to the baseband signal module; the baseband signal module generates a corresponding second baseband signal based on the second power adjustment factor; the power amplifier amplifies the second baseband signal. The accurate control of the microwave system power is realized.
Description
Technical Field
The invention relates to the technical field of output power adjustment of microwave systems, in particular to a microwave power control method and system combining binary search and feedback adjustment.
Background
In the use of a microwave system, in order to achieve different transmitting powers required by users, the traditional method is to set attenuation values of the power amplifier, but the power amplifier output power curve is not in a linear, logarithmic, exponential and other regular relation because the power amplifier output power is greatly influenced by factors such as temperature, component thermal performance, nonlinear characteristics and the like. Therefore, the conventional control method is difficult to accurately realize the modification of the output power of the power amplifier by setting a fixed attenuation value, and the output power cannot be stably maintained at a target value.
In order to avoid the influence of temperature on the output power of the power amplifier and avoid the influence of thermal performance and nonlinear characteristics of components, a method for adjusting the attenuation value of the power amplifier by means of a PID method to realize the adjustment and change of the output power currently exists, and the method can adjust the output power of the power amplifier to be near a target value and to fluctuate up and down, but has poor adjustment precision and larger power fluctuation in the output process.
In view of the above, there is a need for a solution that is accurate in power regulation and has a small power fluctuation range after regulation.
Disclosure of Invention
In view of the above analysis, the embodiment of the invention aims to provide a microwave power control method combining a dichotomy and feedback adjustment, which is used for solving the problems of inaccurate power adjustment and large power fluctuation after adjustment in the prior art.
On one hand, the embodiment of the invention provides a microwave power control method combining binary search and feedback regulation, which comprises a binary search process and a feedback regulation process after the binary search is completed;
the binary search process includes: performing binary search of a power adjustment factor based on the target power value and the current power value reported by the power amplifier, generating a first power adjustment factor, and transmitting the first power adjustment factor to the baseband signal module until the difference value between the reported current power value and the target power value meets an error range; the baseband signal module generates a first baseband signal according to the first power adjustment factor issued each time; the power amplifier amplifies each first baseband signal and reports the current power value;
the feedback adjustment process includes: the power amplifier responds to the inquiry command to report the current power value to the monitoring module, and when the difference value between the reported current power value and the target power value exceeds the error range, a second power adjustment factor is generated and sent to the baseband signal module; the baseband signal module generates a corresponding second baseband signal based on the second power adjustment factor; a power amplifier amplifies the second baseband signal.
Optionally, the performing a binary search of the power adjustment factor based on the target power value and the current power value reported by the power amplifier, generating the first power adjustment factor and sending the first power adjustment factor to the baseband signal module includes:
calculating a middle value Vcent based on a maximum value Vmax and a minimum value Vmin of the first power adjustment factor; when the difference value between the power value reported by the power amplifier and the target power value is smaller than the error range, modifying the minimum value of the first power regulating factor to be the current intermediate value, namely, enabling Vmin to be=Vcent, and calculating a new intermediate value Vcent= (Vmax+Vmin)/2 again according to Vmax and Vmin and issuing the new intermediate value Vcent= (Vmax+Vmin)/2 to the baseband signal module;
when the difference value between the power value reported by the power amplifier and the target power value is larger than the error range, the maximum value of the first power regulating factor is modified to be the current intermediate value, namely Vmax=Vcent, and a new intermediate value Vcent= (Vmax+Vmin)/2 is calculated again and is issued to the baseband signal module.
Optionally, the second power adjustment factor is calculated based on the following formula:
D＝D0+k * (Pt-P0)
wherein D is a second power adjustment factor; d0 is the initial value of the second power adjustment factor; k is a power adjustment scaling factor; pt is the current power value reported by the power amplifier, and P0 is the target power value.
Optionally, a power amplifier amplifies the baseband signal to a radio frequency signal, which is radiated into the air through an antenna.
In another aspect, an embodiment of the present invention provides a microwave power control system combining binary search and feedback adjustment, including:
the monitoring module is used for carrying out dichotomy searching based on the target power value and the current power value reported by the power amplifier in the dichotomy searching process, generating a first power adjusting factor and sending the first power adjusting factor to the baseband signal until the difference value between the reported current power value and the target power value meets the requirement; and the power amplifier is used for periodically inquiring the current power value reported by the power amplifier in the feedback adjustment process after the binary search is completed, and generating a second power adjustment factor to be issued to the baseband signal module when the reported current power value exceeds the error range of the target power value;
the baseband signal module is used for generating a first baseband signal according to the first power adjustment factor issued by the monitoring module each time in the binary search process; and generating a corresponding second baseband signal based on a second power adjustment factor during a feedback adjustment process;
the power amplifier is used for amplifying the first baseband signal in the binary search process and reporting the current power value; and the second baseband signal is used for responding to the inquiry command in the feedback regulation process and reporting the current power value to the monitoring module and amplifying the second baseband signal.
Optionally, the monitoring module performs the following process, specifically including:
when the difference between the power reported by the power amplifier and the target power value is not in the error range, a first power adjustment factor is issued, and a binary search process is performed;
and when the difference value between the power reported by the power amplifier and the target power value is in the error range, stopping the binary search process, and taking the first power adjustment factor at the moment as the initial value of the second power adjustment factor.
Optionally, the dichotomy search is implemented by:
calculating a middle value Vcent based on a maximum value Vmax and a minimum value Vmin of the first power adjustment factor; when the difference value between the power value reported by the power amplifier and the target power value is smaller than the error range, modifying the minimum value of the first power regulating factor to be the current intermediate value, namely, enabling Vmin to be=Vcent, and calculating a new intermediate value Vcent= (Vmax+Vmin)/2 again according to Vmax and Vmin and issuing the new intermediate value Vcent= (Vmax+Vmin)/2 to the baseband signal module;
when the difference value between the power value reported by the power amplifier and the target power value is larger than the error range, the maximum value of the first power regulating factor is modified to be the current intermediate value, namely Vmax=Vcent, and a new intermediate value Vcent= (Vmax+Vmin)/2 is calculated again and is issued to the baseband signal module.
Optionally, the second power adjustment factor is calculated based on the following formula:
D＝D0+k * (Pt-P0)
wherein D is a second power adjustment factor; d0 is the initial value of the second power adjustment factor; k is a power adjustment scaling factor; pt is the current power value reported by the power amplifier, and P0 is the target power value.
Optionally, the monitoring module is further configured to execute the following procedures, specifically including:
transmitting parameters of a target signal to a baseband signal module; the parameters include: signal type, carrier frequency, bandwidth; the baseband signal module generates a baseband signal based on the parameters and outputs the baseband signal to the power amplifier;
and initializing the power amplifier, setting the frequency value of the power amplifier as the signal carrier frequency, and setting the attenuation value as a default value of 0.
Optionally, the first power adjustment factor has a maximum value of 65536 and a minimum value of 0.
Compared with the prior art, the invention has at least one of the following beneficial effects:
1. performing dichotomy search based on target power required by a user and a power value reported by a power amplifier, generating a power regulating factor, transmitting the power regulating factor to a baseband signal module, forming a baseband signal by the baseband signal module according to the regulating factor, transmitting the baseband signal to the power amplifier, amplifying the baseband signal by the power amplifier, reporting the amplified baseband signal by the power amplifier, and circulating until the difference value between the reported current power value and the target power value meets an error range; and obtaining a power value matched with the power required by the user.
When the dichotomy search is stopped, feedback regulation is started at the same time, and when the power value reported by the power amplifier exceeds the error range of the power value required by the user, the power regulation factor is generated again and sent to the baseband signal, and the corresponding baseband signal is generated. The power value reported by the power amplifier is always matched with the power value required by a user through a mechanism combining binary search and feedback, so that the accurate control of the power of the microwave system is realized.
In the invention, the technical schemes can be mutually combined to realize more preferable combination schemes. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, like reference numerals being used to refer to like parts throughout the several views.
FIG. 1 is a schematic diagram of a power adjustment control flow in an embodiment of the present invention;
fig. 2 is a block diagram of a power conditioning system in accordance with an embodiment of the present invention.
Detailed Description
Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form a part hereof, and together with the description serve to explain the principles of the invention, and are not intended to limit the scope of the invention.
In one embodiment of the present invention, a method of microwave power control is disclosed that combines binary search with feedback regulation, as shown in fig. 1. The method specifically comprises a binary search process and a feedback adjustment process after the binary search is completed;
the binary search process includes: performing binary search of a power adjustment factor based on the target power value and the current power value reported by the power amplifier, generating a first power adjustment factor, and transmitting the first power adjustment factor to the baseband signal module until the difference value between the reported current power value and the target power value meets an error range; the baseband signal module generates a first baseband signal according to the first power adjustment factor issued each time; the power amplifier amplifies each first baseband signal and reports the current power value;
the feedback adjustment process includes: the power amplifier responds to the inquiry command to report the current power value to the monitoring module, and when the difference value between the reported current power value and the target power value exceeds the error range, a second power adjustment factor is generated and sent to the baseband signal module; the baseband signal module generates a corresponding second baseband signal based on the second power adjustment factor; a power amplifier amplifies the second baseband signal.
Specifically, the performing a binary search of the power adjustment factor based on the target power value and the current power value reported by the power amplifier, generating a first power adjustment factor and transmitting the first power adjustment factor to the baseband signal module includes:
calculating a middle value Vcent based on a maximum value Vmax and a minimum value Vmin of the first power adjustment factor; when the difference value between the power value reported by the power amplifier and the target power value is smaller than the error range, modifying the minimum value of the first power regulating factor to be the current intermediate value, namely, enabling Vmin to be=Vcent, and calculating a new intermediate value Vcent= (Vmax+Vmin)/2 again according to Vmax and Vmin and issuing the new intermediate value Vcent= (Vmax+Vmin)/2 to the baseband signal module;
when the difference value between the power value reported by the power amplifier and the target power value is larger than the error range, the maximum value of the first power regulating factor is modified to be the current intermediate value, namely Vmax=Vcent, and a new intermediate value Vcent= (Vmax+Vmin)/2 is calculated again and is issued to the baseband signal module.
Specifically, in the binary search process, an operation environment and an external physical interface are provided for monitoring control software through display control equipment. The display control equipment is a notebook computer, the operating system is a Galaxy kylin V10 system, and the external physical interface comprises USB and RJ45 network ports. The USB is used for externally connecting input equipment such as a mouse and the like, and the RJ45 network port is used for connecting a baseband signal module to realize data receiving and transmitting.
And the monitoring control software arranged in the display control equipment is used for realizing the interactive operation of a keyboard and a mouse of a user interface, analyzing and displaying the state information of the baseband signal module and the power amplifier module. The state of the baseband signal module is the running state of the baseband software, including normal, operation and fault; the state of the power amplifier module is a software running state (including normal and fault), the current power value of the power amplifier module and the current attenuation value of the power amplifier module. Executing power regulation logic, and issuing scene signal parameter information and control instructions (including starting baseband signal output, ending baseband signal output and power regulation factors) to a baseband signal module through a display control equipment network port, and issuing control instructions (including power amplifier enabling, power amplifier closing, power amplifier working frequency and power amplifier attenuation values) to a power amplifier module.
In the process of generating the baseband signal, monitoring control software in the display control equipment sends parameters of a target generated signal, such as signal type, carrier frequency and bandwidth, to the baseband signal module. The signal type determines the waveform pattern of the output baseband signal, the bandwidth determines the frequency domain width of the output baseband signal, and the carrier frequency determines the frequency value of the output baseband signal. And generating a baseband signal according to the parameter information sent by the display control equipment, and outputting the baseband signal, stopping the baseband signal and adjusting the amplitude of the baseband signal according to the start signal output, the end signal output and the power adjustment factor information sent by the display control equipment. The power regulating factor can be configured with 16bit in FPGA software of the baseband signal module, the regulating range is 0-65536, and the effective principle of the power regulating factor is that the power regulating factor is multiplied (power regulating factor/65536) on the basis of the output value of the signal DA of the original FPGA; when the power adjustment factor value is 65536, the FPGA outputs baseband signals at full power; when the power adjustment factor value is 0, the FP GA does not output the baseband signal.
The second power adjustment factor is calculated based on the following formula:
D＝D0+k * (Pt-P0)
wherein D is a second power adjustment factor; d0 is an initial value of the second power adjustment factor, during the first feedback adjustment, D0 is a final first power adjustment factor obtained in the binary search process, and after each feedback adjustment is completed, d0=d, that is, the current value of D0 is the value of the last adjusted second power adjustment factor, so as to prepare for the next adjustment. k is a power adjustment scaling factor; pt is the current power value reported by the power amplifier, and P0 is the target power value.
The power amplifier amplifies the baseband signal into a radio frequency signal, and the power amplifier reports the amplified signal and radiates the signal into the air through the antenna.
It should be noted that excessive values of k may result in excessive power feedback adjustment steps, and it may be difficult to achieve stable power output within the error range (p0±0.2dbm). Even always fluctuating up and down outside the error range.
Too small a value of k can affect the feedback adjustment speed, and the up-and-down fluctuation period of power is longer.
Through practical tests, the k value is selected to be-250 in the embodiment, that is, the power adjustment factor issuing value is reduced by 25 every time the current power exceeds 0.1 dB.
The display control equipment network port transmits control instructions (including power amplifier enabling, power amplifier closing, power amplifier working frequency and power amplifier attenuation values) to the power amplifier module. The display control equipment controls the enabling opening of the power amplification module, sets the frequency value of the power amplification module as the signal carrier frequency and sets the attenuation value as the default value 0, and amplifies the baseband signal into the radio frequency signal after the power amplification module executes the control instruction and radiates the radio frequency signal into the air through the antenna.
Then the power amplification module amplifies and outputs the signal according to the baseband signal output by the baseband signal receiving module; and analyzing and executing control instructions of the center frequency and the attenuation value, and reporting the center frequency, the attenuation value and the signal output power information of the power amplifier module.
Specifically, the monitoring control software sends the center frequency of the power amplifier and the attenuation value information to the baseband signal processing module through the network port according to the communication protocol format of the display control equipment and the baseband signal module. Serial port communication exists between the baseband signal module and the power amplifier module, and the baseband signal module transmits the original communication protocol content to the power amplifier module through the serial port.
After receiving the center frequency control instruction, the power amplifier module changes the working frequency of the numerical control attenuator in the module, so that the power amplifier module can flatly amplify signals near the frequency.
After receiving the attenuation instruction, the attenuation value of the numerical control attenuator in the module is changed, so that the effect of influencing the output power of the power amplification module is achieved.
The embodiment of the invention also discloses a microwave power control system combining binary search and feedback regulation, which specifically comprises the following steps:
the monitoring module is used for carrying out dichotomy searching based on the target power value and the current power value reported by the power amplifier in the dichotomy searching process, generating a first power adjusting factor and sending the first power adjusting factor to the baseband signal until the difference value between the reported current power value and the target power value meets the requirement; and the power amplifier is used for periodically inquiring the current power value reported by the power amplifier in the feedback adjustment process after the binary search is completed, and generating a second power adjustment factor to be issued to the baseband signal module when the reported current power value exceeds the error range of the target power value;
the baseband signal module is used for generating a first baseband signal according to the first power adjustment factor issued by the monitoring module each time in the binary search process; and generating a corresponding second baseband signal based on a second power adjustment factor during a feedback adjustment process;
the power amplifier is used for amplifying the first baseband signal in the binary search process and reporting the current power value; and the second baseband signal is used for responding to the inquiry command in the feedback regulation process and reporting the current power value to the monitoring module and amplifying the second baseband signal.
The monitoring module executes the following processes, and the method specifically comprises the following steps:
when the difference between the power reported by the power amplifier and the target power value is not in the error range, a first power adjustment factor is issued, and a binary search process is performed;
and when the difference value between the power reported by the power amplifier and the target power value is in the error range, stopping the binary search process, and taking the first power adjustment factor at the moment as the initial value of the second power adjustment factor.
Specifically, the dichotomy search is implemented by the following process:
calculating a middle value Vcent based on a maximum value Vmax and a minimum value Vmin of the first power adjustment factor; when the difference value between the power value reported by the power amplifier and the target power value is smaller than the error range, modifying the minimum value of the first power regulating factor to be the current intermediate value, namely, enabling Vmin to be=Vcent, and calculating a new intermediate value Vcent= (Vmax+Vmin)/2 again according to Vmax and Vmin and issuing the new intermediate value Vcent= (Vmax+Vmin)/2 to the baseband signal module;
when the difference value between the power value reported by the power amplifier and the target power value is larger than the error range, the maximum value of the first power regulating factor is modified to be the current intermediate value, namely Vmax=Vcent, and a new intermediate value Vcent= (Vmax+Vmin)/2 is calculated again and is issued to the baseband signal module.
And calculating the second power adjustment factor based on the following formula in the feedback process:
D＝D0+k * (Pt-P0)
wherein D is a second power adjustment factor; d0 is the initial value of the second power adjustment factor, namely the final first power adjustment factor obtained in the binary search process; k is a power adjustment scaling factor; pt is the current power value reported by the power amplifier, and P0 is the target power value.
Preferably, the monitoring module is further configured to execute the following procedures, specifically including:
transmitting parameters of a target signal to a baseband signal module; the parameters include: signal type, carrier frequency, bandwidth; the baseband signal module generates a baseband signal based on the parameters and outputs the baseband signal to the power amplifier;
and initializing the power amplifier, setting the frequency value of the power amplifier as the signal carrier frequency, and setting the attenuation value as a default value of 0.
Wherein, the maximum value of the first power adjustment factor is 65536, and the minimum value is 0.
Display control equipment: providing an operating environment and an external physical interface for monitoring control software. The display control equipment is a notebook computer, the operating system is a Galaxy kylin V10 system, and the external physical interface comprises USB and RJ45 network ports. The USB is used for externally connecting input equipment such as a mouse and the like, and the RJ45 network port is used for connecting a baseband signal module to realize data receiving and transmitting.
Monitoring control software:
(1) And receiving the interactive operation of a keyboard and a mouse of the user interface, and analyzing and displaying the state information of the baseband signal module and the power amplifier module. The state of the baseband signal module is the running state of the baseband software, including normal, operation and fault; the state of the power amplifier module is a software running state (including normal and fault), the current power value of the power amplifier module and the current attenuation value of the power amplifier module.
(2) Power adjustment logic is executed (specific procedures are described in the power adjustment procedure).
(3) The scene signal parameter information and the control instruction (including starting baseband signal output, ending baseband signal output and power adjustment factor) are issued to the baseband signal module through the network port of the display control equipment, and the control instruction (including power amplifier enabling, power amplifier closing, power amplifier working frequency and power amplifier attenuation value) is issued to the power amplifier module.
Baseband signal module:
(1) And generating a baseband signal according to the scene signal parameter information sent by the display control equipment, and outputting the baseband signal, stopping the baseband signal and adjusting the amplitude of the baseband signal according to the starting signal output, the ending signal output and the power adjustment factor information sent by the display control equipment. The power regulating factor can be configured with 16bit in FPGA software of the baseband signal module, the regulating range is 0-65536, and the effective principle of the power regulating factor is that the power regulating factor is multiplied (power regulating factor/65536) on the basis of the output value of the signal DA of the original FPGA; when the power adjustment factor value is 65536, the FPGA outputs baseband signals at full power; when the power adjustment factor value is 0, the FPGA does not output a baseband signal.
(2) And converting the control instruction of the power amplifier module sent by the display control equipment into serial data and sending the serial data to the power amplifier module.
And a power amplification module:
(1) And receiving the baseband signal output by the baseband signal module, and amplifying and outputting the signal.
(2) And analyzing and executing the control instructions of the center frequency and the attenuation value.
(3) And reporting the central frequency, attenuation value and signal output power information of the power amplifier module.
Power supply equipment: and the power supply is realized for the display control equipment, the baseband signal module and the power amplifier module.
An antenna: and radiating the radio frequency signal output by the power amplification module into the air.
The communication connection relation of the system is as follows: the display control equipment and the baseband signal module are communicated through a network port; the baseband signal module and the power amplifier module are communicated through a serial port.
The working process of the system is as follows:
the monitoring control software in the display control device sends parameters of the target generated signal, such as signal type, carrier frequency, bandwidth and the like, to the baseband signal module. The baseband signal module generates a corresponding baseband signal according to the signal parameters, and the baseband signal module outputs the baseband signal to the power amplifier module after receiving a control instruction output by the start signal. The display control equipment controls the enabling opening of the power amplification module, sets the frequency value of the power amplification module as the signal carrier frequency and sets the attenuation value as the default value 0, and amplifies the baseband signal into the radio frequency signal after the power amplification module executes the control instruction and radiates the radio frequency signal into the air through the antenna.
The power amplifier module has an output power detection function, can detect the output signal power value and report the output signal power value to the baseband signal module through the serial port, the reporting precision is 0.1dBm, the baseband signal module forwards the state data of the power amplifier module, and finally reports the state data to the display control equipment through the network port and displays the state data on the interface of the monitoring control software.
After the user checks the output power value of the power amplifier module on the monitoring control software interface, whether the output power of the system needs to be regulated is determined according to actual needs, and only quantitative reduction of the output power of the power amplifier to a target value (P0) is supported during primary regulation because the default output power of the system is the maximum value (noted as Pmax). When the system output power value is not Pmax, the system output power is supported to be quantitatively increased according to the user (the Pmax is not exceeded).
The regulation process of the system output power is as follows:
the monitoring control software receives the user power adjustment operation, acquires target output power P0, and utilizes control logic in the software to configure a power adjustment factor in the baseband signal module according to the change of the power amplifier reporting power Pt, so that the output power reported by the power amplifier reaches the error limit range allowed by the user target P0. The adjustment error range is limited to 0.2dBm, namely when Pt is in the value range of P0+/-0.2 dBm, the monitoring control software judges that the power adjustment is successful, and the power adjustment is stopped.
To increase the power regulation speed, a power lookup is first performed using a dichotomy. The specific process is as follows: the monitoring control software performs binary search between the maximum value (65536) and the minimum value (0) of the power adjustment factor of the baseband signal module, reads back the corresponding power amplification power report value after issuing the power adjustment factor to the baseband signal module each time, determines the adjustment direction of the next binary method by comparing the magnitude relation between the current power amplification power report value and the target value, stops searching when the difference between the power amplification power report value and the target value meets the preset error range after searching for a plurality of times, and takes the power amplification power at the moment as an adjustment result.
The specific process of the dichotomy is as follows: calculating an intermediate value Vcent according to the maximum value Vmax (initial 65536) and the minimum value Vmin (initial 0) of the power regulating factor, transmitting the intermediate value Vcent of the power regulating factor to a baseband signal module, then reading back the power report value Pt of the power amplifier, comparing the relation between the report value Pt and a target power value P0, modifying the minimum value of the power regulating factor to be the current intermediate value if Pt-P0< -0.2dB, namely, letting Vmin=Vcent, and calculating a new intermediate value Vcent= (Vmax+Vmin)/2 again according to Vmax and Vmin and transmitting the new intermediate value Vcent= (Vmax+Vmin)/2 to the baseband signal module; if Pt-P0>0.2dB, the maximum value of the power adjustment factor is modified to be the current intermediate value, that is, vmax=vcent, and a new intermediate value vcent= (vmax+vmin)/2 is calculated again and sent to the baseband signal module. After issuing new Vcent each time, waiting for 0.3 seconds to read back the reported value Pt of the power amplifier, if the absolute value of the difference between Pt and P0 exceeds 0.2dBm, executing the step of the last part again until the difference between the two meets the requirement, stopping, and recording the power adjustment factor value as D0 at the moment. The adjustment process of the dichotomy can be completed in 6 seconds under most conditions through multiple actual measurements.
After the microwave power reaches the target value, the output power may change along with time because the power amplifier is affected by temperature and thermal performance of components, so after the binary adjustment is completed, the system enters a continuous feedback adjustment state.
The specific process of feedback regulation is as follows: the monitoring control software inquires the power report value of the power amplifier once every 3 seconds, and when the report value exceeds the error range of the target value (P0+/-0.2 dBm), the monitoring control software transmits the power adjustment factor value to the baseband signal module as follows:
D＝D0+k * (Pt-P0)
wherein D is a second power adjustment factor; d0 is an initial value of the second power adjustment factor, during the first feedback adjustment, D0 is a final first power adjustment factor obtained in the binary search process, and after each feedback adjustment is completed, d0=d is made, that is, the current value of D0 is the value of the last adjusted second power adjustment factor, so that preparation is made for the next adjustment. k is the power adjustment scaling factor in 10/dBm. Pt is the current power value reported by the power amplifier, the unit is dBm, and the precision is 0.1. P0 is the target power value. In this embodiment, k= -250 is taken.
The binary search process and the feedback adjustment process are in a mutual exclusion relation, feedback adjustment is not performed when the binary search is performed, and the feedback adjustment is started after the binary search is completed, so that the system power is ensured to be always stable near the target power. The feedback adjustment process may continue until the user issues a new power control target value or the system ends operation.
Notably, are: the monitoring control software resets the power adjustment factor of the signal baseband module to a maximum value 65536 by default each time the system transmits a new signal parameter.
Examples
1. And a user configures an AM signal through the display control equipment, wherein the carrier frequency is 100MHz, and the bandwidth is 100kHz.
2. The display control equipment sends the signal parameters to the baseband signal module, and the baseband signal module generates a baseband signal and sends the baseband signal to the power amplification module.
3. The display control device controls the power amplification module to enable, the center frequency of the power amplification is set to be 100MHz, and the power amplification module starts to amplify baseband signals and outputs the baseband signals to the antenna.
4. Assume that the power value reported by the power amplifier module obtained from the display control equipment at the moment is 50dBm.
5. The AM signal power for the user target is 40dBm.
6. The user inputs a target value of 40dBm at the display control device.
7. And the display control equipment starts to perform dichotomy power adjustment according to the target power of 40dBm, continuously transmits a power adjustment factor value to the baseband signal module, and reads back the power value reported by the power amplification module after each transmission.
8. And after the adjustment by the dichotomy for a plurality of times, when the difference between the reported power value of the power amplifier and the target value of 40dBm is smaller than 0.2dBm, ending the adjustment by the dichotomy.
9. At the moment, the user does not need to continue to operate, and the display control equipment automatically enters a feedback adjustment stage
10. And the feedback regulation stage display control equipment reads back the reported value of the power amplifier once every 3 seconds and compares the reported value with the target value of 40dBm.
11. When the reported power exceeds 40+/-0.2 dBm, the display control equipment automatically issues a new power regulating factor, and a calculation formula is D=D0+k in a document * (Pt-P0)。
12. Feedback adjustment may be performed until the user ends signaling or a new target power value is issued.
The invention utilizes the control logic in the software to configure the power adjustment factor in the signal baseband module according to the change of the reported power of the power amplifier, so that the radiation intensity of the antenna reaches the user target adjustment effect.
Those skilled in the art will appreciate that all or part of the flow of the methods of the embodiments described above may be accomplished by way of a computer program to instruct associated hardware, where the program may be stored on a computer readable storage medium. Wherein the computer readable storage medium is a magnetic disk, an optical disk, a read-only memory or a random access memory, etc.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention.
Claims (10)
1. The microwave power control method combining the binary search and the feedback regulation is characterized by comprising a binary search process and a feedback regulation process after the binary search is completed;
the binary search process includes: performing binary search of a power adjustment factor based on the target power value and the current power value reported by the power amplifier, generating a first power adjustment factor, and transmitting the first power adjustment factor to the baseband signal module until the difference value between the reported current power value and the target power value meets an error range; the baseband signal module generates a first baseband signal according to the first power adjustment factor issued each time; the power amplifier amplifies each first baseband signal and reports the current power value;
the feedback adjustment process includes: the power amplifier responds to the inquiry command to report the current power value to the monitoring module, and when the difference value between the reported current power value and the target power value exceeds the error range, a second power adjustment factor is generated and sent to the baseband signal module; the baseband signal module generates a corresponding second baseband signal based on the second power adjustment factor; a power amplifier amplifies the second baseband signal.
2. The method for microwave power control by combining binary search and feedback adjustment according to claim 1, wherein the performing binary search of the power adjustment factor based on the target power value and the current power value reported by the power amplifier, generating the first power adjustment factor, and transmitting the first power adjustment factor to the baseband signal module comprises:
calculating a middle value Vcent based on a maximum value Vmax and a minimum value Vmin of the first power adjustment factor; when the difference value between the power value reported by the power amplifier and the target power value is smaller than the error range, modifying the minimum value of the first power regulating factor to be the current intermediate value, namely, enabling Vmin to be=Vcent, and calculating a new intermediate value Vcent= (Vmax+Vmin)/2 again according to Vmax and Vmin and issuing the new intermediate value Vcent= (Vmax+Vmin)/2 to the baseband signal module;
when the difference value between the power value reported by the power amplifier and the target power value is larger than the error range, the maximum value of the first power regulating factor is modified to be the current intermediate value, namely Vmax=Vcent, and a new intermediate value Vcent= (Vmax+Vmin)/2 is calculated again and is issued to the baseband signal module.
3. The method of claim 1, wherein the second power adjustment factor is calculated based on the following equation:
D＝D0+k * (Pt-P0)
wherein D is a second power adjustment factor; d0 is the final first power adjustment factor obtained in the binary search process; k is a power adjustment scaling factor; pt is the current power value reported by the power amplifier, and P0 is the target power value.
4. The method of claim 1, further comprising amplifying the baseband signal to a radio frequency signal by a power amplifier and radiating the radio frequency signal into the air through an antenna.
5. A microwave power control system combining binary search and feedback regulation, comprising:
the monitoring module is used for carrying out dichotomy searching based on the target power value and the current power value reported by the power amplifier in the dichotomy searching process, generating a first power adjusting factor and sending the first power adjusting factor to the baseband signal until the difference value between the reported current power value and the target power value meets the requirement; and the power amplifier is used for periodically inquiring the current power value reported by the power amplifier in the feedback adjustment process after the binary search is completed, and generating a second power adjustment factor to be issued to the baseband signal module when the reported current power value exceeds the error range of the target power value;
the baseband signal module is used for generating a first baseband signal according to the first power adjustment factor issued by the monitoring module each time in the binary search process; and generating a corresponding second baseband signal based on a second power adjustment factor during a feedback adjustment process;
the power amplifier is used for amplifying the first baseband signal in the binary search process and reporting the current power value; and the second baseband signal is used for responding to the inquiry command in the feedback regulation process and reporting the current power value to the monitoring module and amplifying the second baseband signal.
6. The system of claim 5, wherein the monitoring module performs the following steps, in particular:
when the difference between the power reported by the power amplifier and the target power value is not in the error range, a first power adjustment factor is issued, and a binary search process is performed;
and when the difference value between the power reported by the power amplifier and the target power value is in the error range, stopping the binary search process, and taking the first power adjustment factor at the moment as the initial value of the second power adjustment factor.
7. The microwave power control system in combination with feedback regulation of claim 6, wherein the binary search is implemented by:
calculating a middle value Vcent based on a maximum value Vmax and a minimum value Vmin of the first power adjustment factor; when the difference value between the power value reported by the power amplifier and the target power value is smaller than the error range, modifying the minimum value of the first power regulating factor to be the current intermediate value, namely, enabling Vmin to be=Vcent, and calculating a new intermediate value Vcent= (Vmax+Vmin)/2 again according to Vmax and Vmin and issuing the new intermediate value Vcent= (Vmax+Vmin)/2 to the baseband signal module;
when the difference value between the power value reported by the power amplifier and the target power value is larger than the error range, the maximum value of the first power regulating factor is modified to be the current intermediate value, namely Vmax=Vcent, and a new intermediate value Vcent= (Vmax+Vmin)/2 is calculated again and is issued to the baseband signal module.
8. The microwave power control system of any of claims 5-7, wherein the second power adjustment factor is calculated based on the following equation:
D＝D0+k * (Pt-P0)
wherein D is a second power adjustment factor; d0 is the initial value of the second power adjustment factor; k is a power adjustment scaling factor; pt is the current power value reported by the power amplifier, and P0 is the target power value.
9. The system of claim 5, wherein the monitoring module is further configured to perform the following steps, specifically comprising:
transmitting parameters of a target signal to a baseband signal module; the parameters include: signal type, carrier frequency, bandwidth; the baseband signal module generates a baseband signal based on the parameters and outputs the baseband signal to the power amplifier;
and initializing the power amplifier, setting the frequency value of the power amplifier as the signal carrier frequency, and setting the attenuation value as a default value of 0.
10. The microwave power control system of claim 5 wherein the first power adjustment factor has a maximum value of 65536 and a minimum value of 0.
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